cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota adm. jakarta selatan,
Dki jakarta
INDONESIA
Teknologi Indonesia
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 01261533     EISSN : 23031913     DOI : -
Core Subject : Science,
Computer Science & IT
JTI is a journal in the Departement of Engineering Sciences - Indonesian Institute of Sciences (LIPI). JTI has policy to publish a new and original research paper or a review paper in The scope of Technology. JTI publishes two issues per year. The journal has been registered with printed-ISSN number as 0126-1533 and electronic ISSN number as 2303-1913.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue " Vol 36, No 1 (2013)" : 6 Documents clear
SEQUENTIAL EXTENDED KALMAN FILTER ON EEG EXTRACTION AND CLASSIFICATION Turnip, Arjon; Soetraprawata, Demi; Hariyadi, -; Kusumandari, Dwi Esti
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v36i1.195

Abstract

In this paper, a neural networks training based on Sequential Extended Kalman Filtering (SEKF) analysis for extraction and classifi cation of recorded EEG signal is proposed to improved feature extraction, classifi cation accuracy,and communication rate as well. The robustness of the SEKF against background noises has been evaluated by comparing the separation performance indices of the SEKF with well known algorithms (i.e., BPNN, JADE,and SOBI). A statistically signifi cant improvement was achieved with respect to the rates provided by raw data.
THE INFLUENCE OF SOLVENT TYPES ON THE DERIVATIZATION PROCESS USING BIS-TRIMETHYLSILYL TRIFLUOROACETAMIDE (BSTFA) ON COMPOUNDS ANALYSIS OF ACID, BASE, AND ALCOHOL AS A CHEMICAL WEAPONS DERIVATES Pusfitasari, Eka Dian; Andreas, -
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v36i1.196

Abstract

The existence of chemical weapon compounds is forbidden, but its use is still possible by illegal activities such as terrorism. If the compounds were used, they will soon unravel. Therefore, we have to go through to thedegradation product to detect those compounds. Almost all degradation products of chemical weapons are polar and non-volatile because they have some functional group called -OH and -NH2. Consequently, the analysis of these compounds cannot be directly determined by using gas chromatography without derivatization step process. The aim of this study was to determine the effect of the solvent used as the medium during the process of derivatization using BSTFA. The solvent themselves consist of fi ve types, namely acetonitrile, n-hexane, dichloromethane, chloroform, and carbon tetrachloride. The using of acetonitrile and hexane as the derivatization process media did not yield consistent results on the ratio of the area of the chromatograms. Meanwhile, dichloromethane, chloroform,and carbon tetrachloride generated good results; although for very low analyte concentrations, carbon tetrachloride provided more consistent and higher intensity than the chromatograms of DCM and CHCl3 solvent media. The optimum condition we met from the derivatization process was heat up to 70 C for 30 minutes with the addition of 50 ?l BSTFA, and the solvent used as the derivatization process medium was CCl4.
WEB BASED AIR POLLUTION INSTRUMENTATION MONITORING SYSTEM Ari, Ginaldi; Awaludin, Asif; Suherman, Heri; Latief, Chunaeni; Sinatra, Tiin; Sofiati, Iis
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v36i1.197

Abstract

Air pollution dispersion is not only affected by emission source but also by meteorological factor that is involved. Local meteorological factor will change the air pollution dispersion pattern both in urban area and inanother region. Concavity and valley topographic condition in Bandung city will enable temperature inversion and bring about air fl ow back circulation, causing CO pollutant accumulation. CO is one of the primary pollutants that emits directly from the emission source. It is colorless and odorless gas, posseses longer lifetime which is 30-90 days in the troposphere, and also reduces bodys capability of oxygen absorbance, forming carboxy haemoglobin when being inhaled by human. CO concentration monitoring has been conducted by building and designing CO measurement system equipped with temperature and oxygen monitoring. This integration system consists of sensors (over CO, temperature and oxygen), GPRS modem interface module, sensor interface module, webserver and compilation data system completed with graphical visualization of the CO concentration and surface temperature data every 15 minutes. Analysis on CO concentration trend and observation on surface temperature will become references for the research on local meteorological infl uence toward CO ambient concentration.
SIMULATION AND ANALYSIS OF RAYLEIGH BACKSCATTERING EFFECTS IN 105 KM LONG-REACH RSOA-BASED HYBRID WDM/TDM PON TRANSMISSIONS Simatupang, Joni Welman
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v36i1.193

Abstract

Passive Optical Networks (PONs)-based hybrid wavelength-division-multiplexing/time-division-multiplexing (WDM/TDM) technologies could be an excellent candidate for being used in the next-generation optical accessnetworks (NGOANs). However, Rayleigh backscattering (RB) effects can cause severe degradation on their performances while utilizing a single-fiber wavelength-reused loop-back confi guration (re-modulation technique) by employing Refl ective Semiconductor Optical Amplifi ers (RSOAs)-based as colorless upstream transmitters at optical network terminals (ONTs) or optical network units (ONUs). In long-reach PONs, optical amplifi cation is an indispensable solution; therefore optical amplifi ers are exactly needed to enhance the power budget and to prevent the fi ber non-linearity problem. As a proof-of-concept, crosstalk-to-signal (C/S) ratio as a function of feeder or distribution fi ber length is briefl y derived using analytical solution method and then simulated using MATLAB commercial software (R2008b) in order to determine the performance of three different architectures (topologies) of 105 km long-reach RSOA-based hybrid WDM/TDM PON transmissions. After the simulation and analysis, the best C/S ratio of -19 dB is obtained for the third topology. This topology even can serve up to 2048 users (subscribers). Users or subscribers could be at home (known as fi ber-to-the-home, FTTH technologies) or in the building(f ber-to-the-building, FTTB technologies).
THE INTERACTION BETWEEN GLOBAL CLIMATE CHANGE AND TROPICAL FOREST ECOSYSTEMS Rozak, Andes Hamuraby
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v36i1.198

Abstract

In the last 100 years, the global mean temperature has increased approximately 0.6oC and is predicted to increase approximately 1.1oC to 6.4oC in the end of 21st century. On the other hand, deforestation still continues with the rate of -5.2 million hectares per year. This global climate change phenomenon in physical dimension has been analyzed in detail; yet its effect to the changes of biodiversity particularly in tropical forest ecosystems is still poorly understood. From the literature review, it is clear that there is correlation between global climate change and tropical forest ecosystems. The effect of climate change to forest ecosystems itself includes species range shifts, species extinction risks, biome shifts, and biogeochemical cycling. Furthermore, the deforestation of tropical forestecosystems also has reverse effects to the global climate change, i.e. is increasing the amount of green house gasses which directly changes the three climatic variables which are the Earth surface temperature, the total precipitation, and the atmospheric moisture convergence.
DESIGN OF AN ADAPTIVE INTELLIGENT CONTROLLER IN A SEMI-ACTIVE SUSPENSION SYSTEMS Turnip, Arjon; Soetraprawata, Demi; Hariyadi, -; Kusumandari, Dwi Esti
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v36i1.194

Abstract

In this paper, a semi-active control law consists of two tuneable parameters that are given as the function of the running conditions of the vehicle and an adaptive intelligent controller (AIC) is proposed to obtain the best compromise among confl icting performance indices pertaining to the vehicle suspension system. The proposed AIC method is developed based on the frequency regions. The obtained result indicates that a semi-active suspension system based AIC has a signifi cant potential in improving the ride comfort and the road holding.

Page 1 of 1 | Total Record : 6

 1 

Filter by Year

2013 2013


Reset
Filter By Issues
All Issue Vol 41, No 1 (2018) Vol 40, No 2 (2017) Vol 40, No 1 (2017) Vol 39, No 3 (2016) Vol 39, No 2 (2016) Vol 39, No 1 (2016) Vol 38, No 3 (2015) Vol 38, No 2 (2015) Vol 38, No 1 (2015) Vol 37, No 3 (2014) Vol 37, No 2 (2014) Vol 37, No 1 (2014) Vol 36, No 3 (2013) Vol 36, No 2 (2013) Vol 36, No 1 (2013) Vol 35, No 3 (2012) Vol 35, No 2 (2012) Vol 35, No 1 (2012) Vol 34 (2011) Vol 33, No 2 (2010) Vol 33, No 1 (2010) Vol 32, No 2 (2009) Vol 32, No 1 (2009) More Issue